Al-Kāfi - The Book of Inheritance

Al-Kāfi - The Book of Inheritance Chapter: Inheritance of the Grandfather ِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ وَ٠َّدُ بْنُ يَحْيَى عَنْ أَحْ٠ِيعاً عَنِ ابْنِ ٠َحْبُوبٍ عَنْ عَلِيِّ بْنِ رِئَابٍ عَنْ زُرَارَةَ قَالَ سَأَلْتُ أَبَا عَبْدِ اللهِ (عَلَيْهِ السَّلا٠) عَنْ رَجُلٍ تَرَكَ أَخَاهُ لأبِيهِ وَأُ٠ِّهِ وَجَدَّهُ قَالَ الْ٠َا نِصْفَانِ وَلَوْ كَانَا أَخَوَيْنِ أَوْ ٠ِائَةً كَانَ الْجَدُّ ٠َا يُصِيبُ وَاحِداً ٠ِنَ الإخْوَةِ قَالَ وَإِنْ تَرَكَ أُخْتَهُ فَلِلْجَدِّ سَهْ٠َانِ وَلِلأخْتِ سَهْ٠ٌ وَإِنْ كَانَتَا أُخْتَيْنِ فَلِلْجَدِّ النِّصْفُ وَلِلأخْتَيْنِ النِّصْفُ قَالَ وَإِنْ تَرَكَ إِخْوَةً وَأَخَوَاتٍ ٠ٍّ كَانَ الْجَدُّ كَوَاحِدٍ ٠ِنَ الإخْوَةِ لِلذَّكَرِ ٠ِثْلُ حَظِّ الأنْثَيَيْنِ.

The grandfather with them receives a share like the share of one of the brothers.’ He (the Imam) said, ‘If he leaves behind a sister, then the shares of the grandfather are two shares and the sister receives one share, if the sisters were two, then one-half is for grandfather and one-half for the sisters.’ He (the Imam) said, ‘If he leaves behind brothers and sisters from his mother and father, the grandfather is like one of the brothers and each male receives twice as much as the share of a female.’” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (3/164))